For a growing number of NHS dental practices, the question is no longer how to manage the contract but whether to keep it at all. Frustration with UDA targets, clawback risk and a contract value that has not kept pace with costs pushes owners towards a tempting alternative: hand the contract back and go fully private. It can be the right move. But it is a major financial decision dressed as a clinical one, and the practices that regret it are almost always the ones that made it on frustration rather than on numbers.
This guide models the decision properly. Handing back the NHS contract means giving up a guaranteed contract value, the NHS pension on that income and the smooth monthly cash flow, in exchange for private fees you must win and keep patient by patient. We walk through the final reconciliation on the way out, the pension cost, the VAT watch-items, the cash-flow bridge through the transition, and the patient-conversion gamble that sits at the centre of it all. The aim is to turn a heated decision into a modelled one.
Why practices consider going private
The pull factors are real. UDA delivery targets and the threat of clawback below 96% delivery create constant pressure. The per-UDA value on many contracts has not risen with the cost of materials, staff and premises, squeezing margins. Recruitment difficulties make hitting targets harder. And the autonomy of setting your own fees and pace is genuinely attractive after years of working to a contract. None of this is irrational, and for some practices going private is the path to a sustainable, profitable future. The point of modelling is not to talk you out of it, but to make sure the numbers support the instinct.
What handing back actually means
Handing back means giving the commissioner notice to terminate the NHS contract. After it ends, you no longer deliver NHS dentistry under it and you no longer receive the contract value or its monthly payments. You become a fully private practice, earning directly from patients, often through a plan that spreads the cost for them and smooths the income for you. This is different from selling the practice, where the contract is novated to a buyer with commissioner consent. Here you are not transferring the contract; you are ending it. That distinction matters, because a contract handed back is gone, not sold, so there is no buyer paying for its value.
The final reconciliation on the way out
A contract that ends is reconciled like any year-end. If you have under-delivered, you can face a final clawback of the overpayment for undelivered units, just as you would at a normal reconciliation. This is an avoidable exit cost: time the handover around your delivery position, not just the calendar, so that delivery is complete and reconciled cleanly before you leave. The detailed mechanics are in our guide to UDA carry-forward and clawback rules. The headline is simple: do not hand back a contract you have under-delivered without planning for the recovery, or you will pay money on your way out of the system you are leaving.
Losing the NHS pension on that income
This is the cost most often overlooked. While you held the contract, you could pension NHS-derived income through the scheme. Once the contract ends, there is no NHS-pensionable income from it, so accrual on that work stops. Your existing benefits are preserved, but you stop building new, guaranteed, inflation-linked pension on the income you have just given up. For a dentist with significant pensionable NHS income, this is a large hidden cost, and it should be valued and replaced with private pension provision in the model. Our guide to the pensionable pay calculation on NHS contract income explains exactly what you would be giving up. Treat the pension loss as a real annual cost of going private, not a footnote.
Does going private create a VAT problem?
Usually not, but it must be checked. Most private dental care is VAT-exempt, because the supply of dental care that is medical in purpose is exempt whether it is NHS-funded or private. A practice doing ordinary private dentistry, examinations, restorations, hygiene, generally stays exempt and has no VAT registration issue. The watch-item is purely cosmetic work with no therapeutic purpose, such as some facial aesthetics and tooth whitening, which can be standard-rated. If going private shifts your mix towards cosmetic treatment, that taxable income can cross the VAT registration threshold and oblige you to register and operate partial exemption. So the VAT question is not "do I now have to charge VAT on dentistry" (you usually do not), but "is my growing cosmetic income taking me over the threshold". If you were previously registered, our guide to VAT deregistration for a mostly-exempt practice covers the reverse case.
The cash-flow shift
The change in cash flow is one of the sharpest practical consequences. The NHS contract paid smooth, predictable monthly amounts regardless of when you worked. Private income arrives fee by fee, varies with patient flow and seasonality, and depends on retaining patients who previously paid little at the point of care. The most dangerous moment is the transition: the window when NHS income has stopped but private income is still building. A practice that walks into that window without a cash-flow bridge can run out of working capital just as it is trying to establish its new model. A realistic, month-by-month cash-flow projection through the transition is essential before committing, and a plan-based private model can help by making patient income more regular.
Building the income bridge
The heart of the financial decision is the income bridge: a clear, honest comparison of the income you give up against the income you expect to gain. On the left of the bridge is the contract value you are handing back, a known, recurring figure. On the right is the private fee income you expect to generate, which is a projection built on assumptions. The two are not like for like: the contract value is certain and the private income is forecast, so the bridge has to be stress-tested rather than taken at face value.
Build the right-hand side from the ground up. Estimate how many of your current patients will convert to private fees, applying a conservative conversion rate, then the average annual value of a converted patient, whether through a plan or fee-per-item. Add any new private patients you can realistically attract, but do not lean on optimistic growth to make the numbers work. Subtract the cost of delivering private care, which differs from NHS delivery, and remember to add back the cost of replacing the lost NHS pension through private provision. If, after a cautious conversion assumption and the pension replacement cost, the private income comfortably exceeds the contract value, the bridge holds. If it only works on optimistic assumptions, the bridge is fragile, and that fragility is your warning.
What private delivery costs differently
Going private changes the cost base as well as the income, and the changes are not all in one direction. Some costs fall or disappear: the administrative burden of UDA tracking and reconciliation goes, and you are freed from the pressure to chase activity for its own sake. Other costs rise: private practices often invest more in patient experience, marketing and the premises, because a fee-paying patient expects and can choose differently, and you now have to attract and retain patients actively rather than rely on the NHS list. There may be new costs in running a plan, and in the systems to administer private billing. The net effect varies by practice, but the point is that the private cost base is genuinely different, so a model that simply swaps the contract value for private fees while holding costs constant will mislead. Cost the private model on its own terms.
The patient-retention gamble
At the centre of the whole decision is one uncertain number: how many patients convert from NHS to private. Some will follow you and pay private fees; some, used to NHS charges, will not, especially for routine care. The conversion rate drives everything, and assuming full retention is the most common and most damaging error in a going-private model. Sensible modelling assumes a meaningful proportion do not convert, then checks whether the remaining fee income still beats the contract value you gave up. Practices that transition well tend to do so gradually, communicate the change clearly and early, and offer a plan that makes the cost predictable for patients. The honest question is not whether private fees are higher, they are, but whether enough patients will pay them.
Communicating the change to patients
The financial model lives or dies on patient conversion, and conversion in turn depends heavily on how the change is communicated. Patients who feel a change has been sprung on them, or who do not understand why fees are now payable, are far more likely to leave than those who have been brought along thoughtfully. The practices that convert well tend to explain the change early and honestly, set out what patients gain, more time, choice of materials, predictable plan costs, and offer a clear, affordable route to stay, typically a membership plan that turns an unpredictable fee into a manageable monthly amount. The aim is to make staying the easy, understood default rather than an unwelcome surprise. While communication is not an accounting matter, it is the lever that most directly moves the conversion rate, and the conversion rate is the number the whole financial case rests on, so it belongs in the planning, not as an afterthought.
The reversibility question
A sobering point to weigh is that handing back an NHS contract is, in practice, very hard to reverse. Once a contract is terminated, you cannot simply ask for it back if the private model underperforms; new NHS contracts are commissioned at the discretion of the commissioner and are not readily available, so a practice that goes private and then struggles cannot usually retreat to the security it gave up. This asymmetry, easy to leave, hard to return, is a powerful argument for caution and for a conservative model. It is also an argument for the phased approach where feasible, because reducing NHS commitment gradually keeps some optionality open for longer than a clean break does. Treat the decision as close to irreversible, model it as if there is no way back, and only proceed if the numbers hold under cautious assumptions. A move you cannot undo deserves more financial scrutiny, not less.
Goodwill and future sale value
Going private changes the nature of your practice's goodwill. NHS contracts are often valued on the security of recurring contract income, while private goodwill rests on patient loyalty and fee income. A successful conversion can increase value if it lifts profit and demonstrates a loyal, fee-paying base. A half-finished or failing conversion can reduce value, because it strips out the NHS security before private strength is established. If a future sale matters to you, the timing of the move and the state of the conversion at sale both feed the price, so factor the valuation effect into when, and how fast, you go.
Timing the move around delivery and the year-end
Beyond the bigger phased-versus-clean question, the timing of the actual handover has financial consequences worth planning. Because the contract is reconciled when it ends, ending it when your delivery is complete and reconciled cleanly avoids an exit clawback, whereas ending it mid-year with delivery behind target invites a recovery on the way out. There can also be sense in aligning the move with the contract year where practical, so that the final reconciliation is a normal year-end rather than a part-year complication. The notice period required to terminate the contract has to be factored in too, since it determines how long you remain bound to deliver before you are free. None of this changes the strategic decision, but it can save real money and avoid a messy exit, so the handover date is something to choose deliberately, in consultation with your accountant and the commissioner, rather than to set by frustration or a calendar convenience.
A phased move versus a clean break
There are two broad routes, and they trade off differently. A phased transition, reducing NHS commitment over time or converting patient cohorts in stages, lets private income build before NHS income disappears and gives patients time to adjust, lowering cash-flow and retention risk. A clean break is simpler to administer and ends delivery and clawback exposure sooner, but it concentrates all the risk into a single moment. Neither is universally right. A well-capitalised practice with a loyal, affluent patient base might break cleanly; a thinner-margin practice with price-sensitive patients should usually phase. This is precisely the kind of question to model rather than decide on temperament. If a narrower opt-out is what you are considering, our guide to the tax implications of opting out of the NHS contract covers the partial route.
What tax actually changes when you go private
A common misconception is that going private triggers some wholesale change in your tax. It does not change the headline structures or rates: whether you trade as a sole trader, a partnership or a limited company, the income tax, corporation tax, National Insurance and dividend rules are exactly the same private as they were on the NHS. What changes is more subtle but still material. The composition and timing of income shifts from smooth monthly contract payments to lumpier private fees, which affects cash flow and tax-payment planning. The NHS-pensionable pay disappears, which removes a tax-relieved, employer-style pension build that you should replace privately. And the VAT position can change if cosmetic, standard-rated work grows as a share of income.
Crucially, the incorporation and profit-extraction analysis should be revisited once you are private, because two of the inputs that drive it have moved. Without the NHS pension on that income, one of the main arguments against incorporation, the loss of pensionable pay, weakens, which can change the answer on whether a company makes sense. And a private practice with retained profit to reinvest in marketing, premises or growth may find the retention case for a company stronger than it was as an NHS practice drawing everything. So going private is a natural moment to re-run the structure question rather than assume the pre-private answer still holds.
The emotional pull versus the financial case
It is worth naming the psychology, because it is where good decisions go wrong. The pull towards going private is often emotional as much as financial: exhaustion with targets, frustration with a contract value that has not kept pace, resentment of clawback risk, and a longing for the autonomy of setting your own fees and pace. Every one of those feelings is legitimate. But they are reasons to want to go private, not evidence that the numbers support it. The discipline is to separate the two: acknowledge the frustration, then test whether a cautiously modelled income bridge, after pension replacement and a realistic conversion rate, actually clears the contract value you are giving up. Where the model holds, the emotional pull and the financial case point the same way, and you can move with confidence. Where the model is fragile, the frustration is real but going private is not yet the answer, and the better move may be to address the delivery problem, reduce the cost per UDA, or phase the transition rather than leap. Letting the spreadsheet, not the frustration, make the final call is the single best protection against a move you come to regret.
Modelling the decision
Pull the pieces into one model before you give notice. Start with the income bridge: the contract value you lose against the realistic private fee income you gain, after an honest patient-conversion assumption. Add the pension loss as an annual cost, and the private provision needed to replace it. Check the VAT position against any growing cosmetic income. Build a transition cash-flow projection that survives the gap between NHS income stopping and private income maturing. And confirm there is no exit clawback waiting because of under-delivery. Our guides to reading your NHS contract and to the complete private-practice tax position, together with accounting for mixed income during a phased move, give the detail behind each of these.
Going private can be liberating and profitable, and for some practices it is the only sustainable future. But it is a decision to make with a spreadsheet, not a sigh. Value the contract you are giving up, the pension you are losing and the cash-flow gap you must bridge, assume a realistic share of patients do not convert, and only then weigh it against the autonomy and margin private practice offers. Made on numbers, it is a sound strategic choice; made on frustration, it is a gamble with your livelihood.